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Code Issues Releases Activity

sh: Send the "xyz: not found" message to redirected fd 2.

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This also fixes that trying to execute a non-regular file with a command
name without '/' returns 127 instead of 126.
The fix is rather simplistic: treat CMDUNKNOWN as if the command were found
as an external program. The resulting fork is a bit wasteful but executing
unknown commands should not be very frequent.

PR:		bin/137659
This commit is contained in:
Jilles Tjoelker 2009-10-06 22:00:14 +00:00
parent e6b112e274
commit 640b70e414
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=197820
3 changed files with 32 additions and 7 deletions
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9
bin/sh/eval.c
View File

@ -713,12 +713,7 @@ evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
do_clearcmdentry = 1;
}
find_command(argv[0], &cmdentry, 1, path);
if (cmdentry.cmdtype == CMDUNKNOWN) { /* command not found */
exitstatus = 127;
flushout(&errout);
return;
}
find_command(argv[0], &cmdentry, 0, path);
/* implement the bltin builtin here */
if (cmdentry.cmdtype == CMDBUILTIN && cmdentry.u.index == BLTINCMD) {
for (;;) {
@ -740,7 +735,7 @@ evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
/* Fork off a child process if necessary. */
if (cmd->ncmd.backgnd
|| (cmdentry.cmdtype == CMDNORMAL
|| ((cmdentry.cmdtype == CMDNORMAL || cmdentry.cmdtype == CMDUNKNOWN)
&& ((flags & EV_EXIT) == 0 || have_traps()))
|| ((flags & EV_BACKCMD) != 0
&& (cmdentry.cmdtype != CMDBUILTIN

1
bin/sh/exec.c
View File

@ -429,6 +429,7 @@ find_command(char *name, struct cmdentry *entry, int printerr, char *path)
outfmt(out2, "%s: %s\n", name, strerror(e));
}
entry->cmdtype = CMDUNKNOWN;
entry->u.index = 0;
return;
success:

29
tools/regression/bin/sh/execution/unknown1.0 Normal file
View File

@ -0,0 +1,29 @@
# $FreeBSD$
nosuchtool 2>/dev/null
[ $? -ne 127 ] && exit 1
/var/empty/nosuchtool 2>/dev/null
[ $? -ne 127 ] && exit 1
(nosuchtool) 2>/dev/null
[ $? -ne 127 ] && exit 1
(/var/empty/nosuchtool) 2>/dev/null
[ $? -ne 127 ] && exit 1
/ 2>/dev/null
[ $? -ne 126 ] && exit 1
PATH=/usr bin 2>/dev/null
[ $? -ne 126 ] && exit 1
dummy=$(nosuchtool 2>/dev/null)
[ $? -ne 127 ] && exit 1
dummy=$(/var/empty/nosuchtool 2>/dev/null)
[ $? -ne 127 ] && exit 1
dummy=$( (nosuchtool) 2>/dev/null)
[ $? -ne 127 ] && exit 1
dummy=$( (/var/empty/nosuchtool) 2>/dev/null)
[ $? -ne 127 ] && exit 1
dummy=$(/ 2>/dev/null)
[ $? -ne 126 ] && exit 1
dummy=$(PATH=/usr bin 2>/dev/null)
[ $? -ne 126 ] && exit 1
exit 0